Do I leave the save fixer in the game folder after I install LightmanP's mod? I'm assuming the process is:
1.) Install 8.0
2.) Import Saves folder
3.) Install Save Fixer
4.) Run the last imported save on 8.0 and make a clean save
5.) Install LightmanP mod
6.) Load modded game with clean save
I'm not sure if the save fixer interferes wiith any other modded saves or if the stuff that Sancho wrote to the saves persists in future saves.
Probably you can skip step 4 but no harm done doing it also for safety, for what I notice in other games only is a problem if you still load Sancho modded saves, the clean saves work for me even if I take the SaveFixer out, I still leave it there anyway because I may need to check an older save made with Sancho mod. I save often hehe almost on every choice games give and in between chapters/episodes.
Edit: Just to really check if was an issue I moved the SaveFixer out of game folder and tried new saves I did with LightmanP mod and weirdly gives errors, so I guess I was wrong (for this game, in others with previous Sancho mod that I tested it worked) and the SaveFixer needs to be kept there it seems, not an issue for me because I would always keep it there, it is such a tiny file anyway. I may one day make a fresh playthrough anyway and before doing it I'll take it out just as a preventive measure, maybe it modifies every save, even the ones done from a new game.
Edit2 : I did several tests saving files using a playthrough I had before using Sancho mod that was with LightmanP mod (I only started a new playthrough with Sancho mod after I already played 0.7 version because I wasn't aware Sancho had a mod for Eternum) and also doing new playthrough game saves, both with the SaveFixer in the game folder. So I can say both those saves work with no issues when I remove the SaveFixer so it doesn't affect saves done with LightmanP mod and probably unmodded too. It only affects saves that had before been used with Sancho mod, the SaveFixer probably just ignores some variables that Sancho mod used and makes them work unmodded or with other mod so in those if you remove the SaveFixer from the game folder they give an error.
So in conclusion if you continue from a save file that used before the Sancho mod you have to use always the the SaveFixer file in the game folder.